Observation of total irradiance variability from Nimbus satellites
Abstract
The cavity pyrheliometer sensor aboard Nimbus 7 is now in its tenth year of operation. Results for 9 1/2 years show a decreasing trend through the end of solar cycle 21 of approximately -0.015% per year, a levelling off near solar minimum and an increasing irradiance for the beginning of cycle 22. Through April 1988 the irradiance has increased about 0.06% above the minimum value which was about 0.08% below the highest values obtained near solar maximum. The rise appears more rapid than the decline.
- Publication:
-
Advances in Space Research
- Pub Date:
- 1988
- DOI:
- 10.1016/0273-1177(88)90164-0
- Bibcode:
- 1988AdSpR...8g...5H
- Keywords:
-
- Nimbus 7 Satellite;
- Solar Constant;
- Solar Cycles;
- Earth Radiation Budget;
- Maxima;
- Minima;
- Sunspots;
- Solar Physics